为什么”不可胜“的意思是反转的？你们能不能给我解释一下吗?

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@pekomon @chris6911 孙子曰：昔之善战者，先为不可胜。不可胜=肯定会瀛，为什么呢

@shihao 为什么文言文的意思没有太多道理

@shihao @chris6911 谢谢你们的回复，为什么有一些情况胜=瀛，但是“不可胜”，这个胜=战胜，我觉得有点困惑。

@ChinglishTeadent how can I tell if "胜“ = defeat or win? In fact, I keep on encountering situations like this, where words reverse it's meaning in the different situation. Like 臣, does it mean "slave" or "state official", that one is a bit easier, since it's obvious why did 臣 turn into the meaning of those, but 胜 here makes no sense to me.

@chris6911 thank you, and how can english sentences be idiomatic? But anyways, what do you mean by "You can collect different meanings of one character and match them up with different sentences, just like your highschool classes"

@chris6911 the meanings you gave me are all not matched with 不可胜, and also all of these meanings don't need to be seperately memorized since they are all similar, and in english, figurative language like this is also there. 我是说你给我胜的meaning啊，都很相关but none of them actually mean the 不可胜 meaning, where 胜=lose, or to "被"胜

@chris6911 我觉得你有一些语法的问题，只要注意，才能提高idiomaticness。

"You can recite all these meanings", --> "You can recite all OF these meanings".

"You can choose the most suitable meanings" --> "You can choose the most suitable MEANING"

"What makes things even worse is that we don't have certain way to find out the suitable meaning directly" --> "What makes things even worse is that we don't have A certain way to find out A suitable meaning directly"

@chris6911 我以为“为”=become。（他）为天下笑：天下笑他，他“为”这个东西，这就是很简单，一个很常见的文言文规则，但是孙子的话比较难。先为不可胜=他先变得“不可胜”，我觉得就是这样。我也可以造句子：吾为其（所）好=我“为”他喜欢的东西。